JP4267532B2 - Battery-powered engine-driven welding machine - Google Patents

Description

  TECHNICAL FIELD The present invention relates to a battery combined type engine driven welding machine that uses both an engine welder and a battery welder, and more particularly to a battery combined type engine driven welding that can be used independently as both an engine welder and a battery welder. Related to the machine.

  This type of battery-coupled engine-driven welder usually uses both an engine welder and a battery welder, but depending on the use conditions, it may be used only as a battery welder or only as an engine welder. ing.

  For example, in Patent Document 1, a case where an engine welder and a battery welder are connected and supplied in parallel is set as a large output mode, and a case where the welding DC output of each welder is supplied independently is set as a small output mode. A changeover switch for selecting these modes is provided.

Moreover, in patent document 2, when using it as a battery combined use engine drive welding machine, an engine switch and a battery switch are turned on, and when using it as an engine welding machine, only an engine switch is turned on and used as a battery welding machine. In this case, only the battery switch is turned on. And when using and stopping as a battery combined use engine drive welding machine, at the time of stopping, only the engine switch is turned off and the battery switch is often forgotten. Therefore, it has been devised so that if only the engine switch is turned off, the battery switch is also turned off in conjunction with it.
JP 4-135070 A Japanese Laid-Open Patent Publication No. 5-77729

  In the case of Patent Document 1, the operator manually operates various switches, and the operation itself is complicated. In particular, if the two input power switches of the charging device may be accidentally turned on simultaneously by the operator, the single-phase winding of the engine welder and the commercial power supply enter in parallel, which is dangerous.

  In the case of Patent Document 2, it is possible to prevent the switch from being forgotten to be turned off, but the entire operation is manually set by the operator, and the complexity is not eliminated. Moreover, there is a problem that the battery cannot be charged when used as a battery welder.

  The present invention has been made in consideration of the above points, and is used simultaneously with an engine welder and a battery welder, used as a battery welder while charging from a commercial power source, and as a battery welder without a commercial power source. It is an object of the present invention to provide a battery combined type engine-driven welding machine that can easily switch between use and use as an engine welding machine.

In order to achieve the above object, in the present invention,
A battery combined type engine-driven welding machine using both an engine welder and a battery welder, wherein a part of the output of the engine welder is used as an AC auxiliary power source, and a part of the AC auxiliary power source is used as the battery. In what is used as a power source for charging the battery of the welder,
Charging means for charging the battery by being fed from a commercial power source or the AC auxiliary power source; a first detection circuit that generates an output signal when the voltage of the auxiliary power source is present;
A second detection circuit that produces an output signal when there is a main power supply voltage for charging the battery;
A third detection circuit that produces an output signal when there is a commercial power supply voltage;
A fourth detection circuit that generates an output signal when the battery welding mode pushbutton is pressed;
When there is an output signal of the first and second detection circuits, it is a hybrid welding mode, when there is an output signal of the first detection circuit, and when there is no output signal of the second detection circuit, it is an engine welding mode, When there is no output signal of the first detection circuit and there are output signals of the second , third, and fourth detection circuits, the battery welding mode for welding while charging by the charging means is set, and the first detection circuit and the first detection circuit And a battery welder control device for battery welding mode in which welding is performed without charging when there is no output signal of the third detection circuit and there is an output signal of the fourth detection circuit. Welding machine,
Is to provide.

  As described above, the present invention automatically selects the optimum operation mode in accordance with various power supply conditions in the battery-coupled engine-driven welding machine, so that accurate operation can be performed without requiring complicated operations. it can. As a result, various problems caused by an erroneous operation, which has been a problem in the past, can be solved.

  Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.

  FIG. 1 is an explanatory diagram showing the configuration of an embodiment of the present invention. As shown in FIG. 1, the welding machine G driven by the engine E has two outputs. One of them is supplied as a DC welding output to the welding output terminal 10 via the control rectifier 11 and the DC reactor 12. The other is supplied as an AC output to the AC auxiliary power terminal 20 via the inverter 21 and the breaker 22.

  In this embodiment, the welding output by the battery B is supplied in addition to the output of the welding machine G. Then, as a countermeasure for charging the battery B, the AC auxiliary power output from the inverter 21 and the commercial power AC are selectively drawn into the charging transformer 32 and used. The battery welding machine controller 34 controls the chopper 35 using the IGBT in accordance with these power supply conditions, that is, the state of the AC auxiliary power supply, the commercial power supply, and the main power supply for charging based on both. Controls the output supply to

In this embodiment, the AC auxiliary power supply voltage S1 is output from the output side of the inverter 21.
The main power supply voltage S2 is extracted from the input side of the charging transformer 32, and the commercial power supply voltage S3 is further extracted from the commercial power supply AC, and applied to a voltage detection circuit described later with reference to FIG. 2 to form a voltage signal.

  That is, the battery welding machine control circuit 34 includes an AC auxiliary power supply voltage signal S01, a battery welding machine main power supply voltage signal S02, and a commercial power supply voltage signal S03 formed by the voltage detection circuit shown in FIG. 2 from the voltages S1, S2, and S3. When a welding output is supplied from the battery B as a control power source or to the welding output terminal 10, power is supplied through a path via the DC reactor 36, the clamp diode of the chopper 35, and the diode D1.

  A relay Ry1 is connected to the output terminal of the inverter 21, and when the relay Ry1 is energized, the output of the inverter 21 is fed to the charging transformer 32 via the contact of the relay Ry1. When there is no AC auxiliary power and relay Ry1 is de-energized, the relay contact is connected to commercial power AC.

  If the commercial power supply AC is active at this time, the charging transformer 32 is supplied with power from the commercial power supply AC via the relay contact and the breaker 31. The control power of the battery welding machine control device 34 is supplied by the relay Ry2 provided on the primary side of the charging transformer 32 if either the AC auxiliary power or the commercial power is active.

  A control rectifier 33 is provided on the secondary side of the charging transformer 32, and the battery welder control device 34 controls the operation of the control rectifier 33 in accordance with the voltage signals S01, S02, S03 and the opening / closing of the push button switch PB. In addition, the contactor MC and the chopper 35 are controlled, and the welding output is supplied from the battery B.

  That is, when the push button switch PB is pressed, an ON signal is given to the battery welding machine control device 34 by the illustrated left contact of the push button switch PB, and control power is supplied by the illustrated right contact. Then, the contactor MC is closed, and the output of the battery B is supplied to the welding output terminal 10 via the chopper 35 and the DC reactor 36.

  When power is supplied from the battery B to the welding output terminal 10, there are a case where the AC auxiliary power source or the commercial power source is active and the battery B is charged, and a case where there is no power supply from both power sources and no charging is performed.

  FIG. 2 shows a configuration of a voltage detection circuit that forms three voltage signals S01, S02, and S03 to be supplied to the battery welder control device 34. This circuit has three circuits for AC auxiliary power supply voltage detection, battery welding machine main power supply voltage detection, and commercial power supply voltage detection. Voltage circuits S01, S02, and S03 are formed separately for battery welding. To the machine controller 34.

  Each of them has the same circuit configuration, a half-wave rectifier circuit using a diode D, a smoothing circuit having resistors R1 and R2 and a capacitor C, and an output of the half-wave rectifier circuit, and a photocoupler PC which receives an output of the smoothing circuit , And a resistor R3 connected to the photocoupler PC.

  For example, the AC auxiliary power supply voltage detection circuit is supplied with an AC voltage signal S1 obtained from the output side of the inverter 21 and is half-wave rectified by a diode D to form a DC voltage by a smoothing circuit using resistors R1 and R2 and a capacitor C. To the photocoupler PC. Photocoupler PC provides battery welder control device 34 with a voltage signal S01 corresponding to the DC voltage of the smoothing circuit from its output side. Similarly, the commercial power supply voltage detection circuit and the battery welding machine main power supply voltage detection circuit detect the voltage signals S02 and S03 and supply them to the battery welding machine control device 34.

  FIG. 3 is a flowchart showing the operation content of the battery welder control device 34 in FIG. The battery welder control device 34 has four welding modes, namely engine welding, depending on the status of the three power sources, that is, the AC auxiliary power source, the commercial power source state, and the battery welder main power source state based on these two power source states. Select the mode, hybrid welding mode, battery welding mode (with charging) and battery welding mode (without charging).

  The engine welding mode uses only the output of the engine welder, and the battery welding mode basically uses only the output of the battery, although there is a difference in whether or not replenishment is performed by charging. The mode is characterized in that both outputs are used together.

  The advantage of the battery combined use engine-driven welding machine having the hybrid welding mode is that a large output can be obtained despite the small size and light weight. Portable engine welders are broadly divided into 300A class diesel engine machines and 150A class gasoline engine machines. The engine-driven welding machine with a battery is a small gasoline engine machine, but with the help of the battery, it is large. The ability of a diesel engine can be demonstrated.

  In the operation shown in FIG. 3, it is first determined whether or not the voltage of the AC auxiliary power supply is present (step S11). If there is, the presence or absence of voltage of the battery welding machine main power source is determined in step S12. If breaker 31 (FIG. 1) is off and there is no main power supply voltage, the engine welding mode is selected in step S13, and the process returns to step S11 after the end of welding.

  On the other hand, if there is a voltage of the main power source, the process proceeds to step S14 to turn on the contactor MC, and the hybrid welding mode in step S15 is selected. In the hybrid welding mode, the engine welder and the battery welder are output at the same time, and when the welding is interrupted, the battery B is charged to recover the charging power of the battery.

  After the end of welding, the presence / absence of the voltage of the AC auxiliary power supply is determined in step S16. If there is, the hybrid welding mode is continued.

  Next, if it is determined in step S11 that there is no AC auxiliary power supply voltage, the process proceeds to step S21. Then, the presence or absence of the voltage of the commercial power supply is determined (step S21). If there is a voltage of the commercial power supply, the process proceeds to step S22, and the presence or absence of the voltage of the main power supply is determined. If there is a voltage of the main power supply, the contactor MC is turned on in step S23 and the process proceeds to step S24 to determine whether or not the push button switch is on. If it is turned on, the process proceeds to step S25 to select the battery welding mode (with charging). In welding in this welding mode, the battery welding mode S25 is continued in step S26 until the interruption time exceeds a specified time by a stop timer (not shown). If it exceeds, the process proceeds to step S28, the contactor MC is turned off, and the process returns to step S11.

  Further, when the operator finishes the welding operation and forcibly ends the battery welding mode S25, the push button is pressed again, and this is determined by step S27. If it is on, the process proceeds to step S28, where the contactor MC Is turned off, and the process returns to step S11.

  In step S11, when there is no AC auxiliary power supply voltage and the process proceeds to step S21, if there is no commercial power supply voltage, the process proceeds to step S31. Then, it is determined whether or not the push button switch is on. When turned on, the process proceeds to step S32 where the contactor MC is turned on and the battery welding mode (no charging) is performed.

  During this operation, the battery welding mode in step S33 is continued until the welding interruption time becomes equal to or greater than the specified value. On the other hand, when the welding interruption time becomes longer than the specified time, the contactor MC is turned off and the process returns to step S11.

  Further, when the operator finishes the welding operation and forcibly ends the battery welding mode S33, the push button is pressed again, and this is determined in step S35. Is turned off, and the process returns to step S11.

Explanatory drawing which shows the structure of one Example of this invention. The circuit diagram which shows the structure of the voltage detection circuit used for the Example of FIG. The flowchart explaining operation | movement of the Example of FIG.

Explanation of symbols

E engine, G welder, B battery, D diode, R resistance,
C capacitor, PB push button switch, PC photocoupler,
Ry relay, MC contactor, AC commercial power, S voltage signal,
11 Control rectifier, 12, 36 DC reactor, 21 Inverter,
22, 31 breaker, 32 charging transformer, 33 control rectifier,
34 Battery welder control device, 35 chopper.

Claims (2)

A battery combined type engine-driven welding machine using both an engine welder and a battery welder, wherein a part of the output of the engine welder is used as an AC auxiliary power source, and a part of the AC auxiliary power source is used as the battery. In what is used as a power source for charging the battery of the welder,
Charging means for charging the battery by being fed from a commercial power source or the AC auxiliary power source; a first detection circuit that generates an output signal when the voltage of the auxiliary power source is present;
A second detection circuit that produces an output signal when there is a main power supply voltage for charging the battery;
A third detection circuit that produces an output signal when there is a commercial power supply voltage;
A fourth detection circuit that generates an output signal when the battery welding mode pushbutton is pressed;
When there is an output signal of the first and second detection circuits, it is a hybrid welding mode, when there is an output signal of the first detection circuit, and when there is no output signal of the second detection circuit, it is an engine welding mode, When there is no output signal of the first detection circuit and there are output signals of the second , third, and fourth detection circuits, the battery welding mode for welding while charging by the charging means is set, and the first detection circuit and the first detection circuit And a battery welder control device for battery welding mode in which welding is performed without charging when there is no output signal of the third detection circuit and there is an output signal of the fourth detection circuit. Welding machine. In the battery combined use engine drive welding machine according to claim 1,
The battery welder control device includes:
A stop timer for forming an output signal when the welding interruption time in the battery welding mode has passed a predetermined time;
A battery combined type engine-driven welding machine configured to stop the battery welding mode when there is an output signal of the stop timer.

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